AnsweredAssumed Answered

AD8429 spice model broken? Will not simulate correctly in Proteus 8.1

Question asked by hsheikh on Mar 10, 2014
Latest reply on Mar 12, 2014 by hsheikh

Dear Engineering Zone,


I recently contacted AD by email regarding their spice model for the AD8429 that I downloaded from the AD website.


AD8429 SPICE Macro-model

Description: Amplifier

Generic Desc: 36V Bipolar Low Noise InAmp G1-1000

Developed by: ADN IAP ADI

Revision History: 10/11/2012 - Updated to new header style

4.0 (10/2012)

Copyright 2012 by Analog Devices.



I want to use the AD8429 as a differential input stage because its specification almost fits my application however the simulation model does not work using Proteus 8.1. The device seems to output a fixed voltage coincident with the +VS supply line. I have also received confirmation that the model does not work using SI METRIX.


Unfortunately AD replied that they were busy and that I should seek help from the forum. 


Thank you for your consideration.